﻿using System;
using System.Configuration;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Globalization;
using System.IO;
using System.Web.Mvc;
using System.Web.Security;
using System.Web.UI;
using BLL;
using Model;

namespace Web.Controllers
{

    public class AccountController : Controller
    {
        Sys_Users_BLL _Sys_Users_BLL = new Sys_Users_BLL();

        public virtual ActionResult LogOn()
        {
          


            Sys_Parameter_BLL _Sys_Parameter_BLL = new Sys_Parameter_BLL();
            ViewData["Title"] = _Sys_Parameter_BLL.Get("系统主名称");
            ViewData["Title1"] = _Sys_Parameter_BLL.Get("系统副名称");
            return View();
        }

        [HttpPost]
        [ValidateAntiForgeryToken()]
        public virtual ActionResult LogOn(LogOnModel item)
        {
            if (!string.IsNullOrEmpty(item.lang))
            {
                CultureInfo cultureInfo = new CultureInfo(item.lang);
                this.Session["Culture"] = cultureInfo;
                System.Threading.Thread.CurrentThread.CurrentCulture = cultureInfo;
                System.Threading.Thread.CurrentThread.CurrentUICulture = cultureInfo;
                System.Threading.Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(cultureInfo.Name);
                System.Threading.Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(cultureInfo.Name);
            }

            LogOn();

            string code = "";
            if (TempData["SecurityCode"] != null)
            {
                code = TempData["SecurityCode"].ToString();
            }
            if (code.Equals(item.authcode, StringComparison.OrdinalIgnoreCase) || !ConfigurationManager.AppSettings["EnableAuthcode"].Equals("true"))
            {


                if (_Sys_Users_BLL.check(item.UserName, item.Password))
                {
                    FormsAuthentication.SetAuthCookie(item.UserName, item.RememberMe);

                    if (Request["ReturnUrl"] != null)
                    {
                        return Redirect(Request["ReturnUrl"]);
                    }
                    else
                    {
                        return Redirect("/");
                    }
                }
                else
                {
                    ModelState.AddModelError("", "用户名密码错误！");
                }
            }
            else
            {
                ModelState.AddModelError("authcode", "验证码错误！");
            }
            return View();
        }

        public virtual ActionResult LogOff()
        {
            FormsAuthentication.SignOut();
            return Redirect("/");
        }

        [OutputCache(Location = OutputCacheLocation.None, Duration = 0, NoStore = false)]
        public ActionResult SecurityCode()
        {

            string oldcode = TempData["SecurityCode"] as string;
            string code = CreateRandomCode(4);
            TempData["SecurityCode"] = code;

            // return File(CreateImage(code), "image/Jpeg");

            return File(CreateValidateGraphic(code), "image/Jpeg");
        }

        private byte[] CreateImage(string checkCode)
        {
            int iwidth = (int)(checkCode.Length * 12);
            System.Drawing.Bitmap image = new System.Drawing.Bitmap(iwidth, 20);
            Graphics g = Graphics.FromImage(image);
            Font f = new System.Drawing.Font("Arial", 10, System.Drawing.FontStyle.Bold);
            Brush b = new System.Drawing.SolidBrush(Color.White);
            //g.FillRectangle(new System.Drawing.SolidBrush(Color.Blue),0,0,image.Width, image.Height);

            g.Clear(Color.Blue);

            g.DrawString(checkCode, f, b, 3, 3);

            Pen blackPen = new Pen(Color.Black, 0);
            Random rand = new Random();
            for (int i = 0; i < 5; i++)
            {

                int x1 = rand.Next(image.Width);
                int x2 = rand.Next(image.Width);
                int y1 = rand.Next(image.Height);
                int y2 = rand.Next(image.Height);

                g.DrawLine(new Pen(Color.Silver, 1), x1, y1, x2, y2);

                //int y = rand.Next(image.Height);
                //g.DrawLine(blackPen, 0, y, image.Width, y);
            }

            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            return ms.ToArray();
            //Response.ClearContent();
            //Response.ContentType = "image/Jpeg";
            //Response.BinaryWrite(ms.ToArray());
            //g.Dispose();
            //image.Dispose();
        }


        private string CreateRandomCode(int codeCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,W,X,Y,Z";
            string[] allCharArray = allChar.Split(',');
            string randomCode = "";
            int temp = -1;

            Random rand = new Random();
            for (int i = 0; i < codeCount; i++)
            {
                if (temp != -1)
                {
                    rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
                }
                int t = rand.Next(35);
                if (temp == t)
                {
                    return CreateRandomCode(codeCount);
                }
                temp = t;
                randomCode += allCharArray[t];
            }
            return randomCode;
        }


        /// <summary>
        /// 创建验证码的图片
        /// </summary>
        /// <param name="containsPage">要输出到的page对象</param>
        /// <param name="validateNum">验证码</param>
        public byte[] CreateValidateGraphic(string validateCode)
        {
            Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 13.0), 22);
            Graphics g = Graphics.FromImage(image);
            try
            {
                //生成随机生成器
                Random random = new Random();
                //清空图片背景色
                g.Clear(Color.White);
                //画图片的干扰线
                for (int i = 0; i < 25; i++)
                {
                    int x1 = random.Next(image.Width);
                    int x2 = random.Next(image.Width);
                    int y1 = random.Next(image.Height);
                    int y2 = random.Next(image.Height);
                    g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
                }
                Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
                LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),
                 Color.Blue, Color.DarkRed, 1.2f, true);
                g.DrawString(validateCode, font, brush, 3, 2);
                //画图片的前景干扰点
                for (int i = 0; i < 100; i++)
                {
                    int x = random.Next(image.Width);
                    int y = random.Next(image.Height);
                    image.SetPixel(x, y, Color.FromArgb(random.Next()));
                }
                //画图片的边框线
                g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
                //保存图片数据
                MemoryStream stream = new MemoryStream();
                image.Save(stream, ImageFormat.Jpeg);
                //输出图片流
                return stream.ToArray();
            }
            finally
            {
                g.Dispose();
                image.Dispose();
            }
        }
    }
}
